Improvement in combined burglar-alarm and indicator



2 Sheets--Sheet 1. N 0. E. HART &7 JOHNSON. Oombned Burglar Alrm and Indioator.

No. 206,IO5.

Patented July 16, 1878.

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INVENTOII WITNESSES lom@ i N.FETERS, PHOTO 2 Sheets-Sheet 2.

C. E. 'HART &u T. JOHNSQN. Combined Burglar Alarm and Indicator Patented luly16, 1878.

N. PETERS. FHOTO-LITHOGRAF WASHINGTON.

UNITED STATES PATENT OFFICE,

CHARLES E. HART AND TOBY J OHNSON, OF LAKE LILLIAN, MIN NESOTA.

IMPROVEMENT IN COMBINED BURGLAR-ALARM AND IND ICATOR.

Specification torning part of Letters Patent No. 206,105, dated J uly 16, 1878; application filed March 11, 1878.

To all whom it may concern:

Be it known that we, CHARLES E. HART and TOBY JOHNSON, of Lake Lillian, in the connty of Kandiyohi and State of Minnesota, have invented a new and Improved Combined Burglar-Alarm and Indicator and we do hereby declare that the following is a full, clear, and exact description of the same.

The invention is an improvement in the class of burglar-alarms in which the alarm is operated whenever a cord connected with the doors and windows of a dwelling is subjected to tension by the act of opening a door or window to efi'ect an entrance into the dwelling.

In the accompanying drawing, forming part of this specification, Figure 1 shows the mode of connecting the alarm with doors and windows. Fig. 2 is a ertical section of the indicator. Fig. 3 is a plan View of the indicator, the top thereof being removed. Fig. 4 is a detail View. Fig. 5 represents a mode of connecting indicator with the hinges of doors.

The indicator and alarm mechanism proper are inclosed in or attached to a box or case, A, which is located in a chamber or any other apartment where it may be deened most expedient.

Wires B connect with 'the indicator, and a releasing device, C, and the other wires, B', extend to the several rooms of the dwelling, with the doors and windows of which they are connected by branch wires a, as hereinafter described, so that if one of the doors or windows shall be opened the wire B' connected therewith will be subjected to increased tension, and the corresponding wire B at once relieved of tension, so that the alarm will be sounded and the locality of the burglarious entrance ndicated.

We will proceed to describe the details of the Construction and arrangement of parts.

The main wires B', only one of which is shown, are attached to a spring-releasing de- Vice, G, and extend along the ceiling of apartment, (being supported in suitable guides,) and branch wires wconnect them with the several doors and windows. The branch wires a pass through screw eyes or guides b, located in such relation to the windows and doors that when the latter are opened the main wire B' Will be subjected to such tension as to overcome the comparatively weak tension of the spring of the releasing device C, and thereby allow the alarm and indicator to operate.

Device C consists of two parts-a springdog, c, to which wire B'is attached, andapivoted catch, d, with which the dog is normally engaged. p

A wire, B, is attached to the catch d, and to a lover, l), for Operating the alarm mechanism, and when the dog c releases the catch d the lever D is retracted by a strong spring, E, and allows the alarm to sound.

The alarm proper consists of a gon g or bell, F, and clock-work .G.

The clock-work G is shown attached to the side of a Vertical partition, f, of box or case A, but may be otherwise located, if desired.

Beneath the clock-work G is a series of le- Vers, D', pivoted horizontally in slots in the partition f.

A bar, I, is supported 011 one end of the levers D', and held in guides g, and also provided with pendent fingers e, one of which projects between each two of the levers.

A Weak spiral spring, m, Fig. 3, is attached to the left-hand end of this bar I, and a chain, n, also connects it with the pallet 0 of the clock-work G.

The opposite ends of the levers D' are, in practice, all jointed to separate and corresponding Vertical pivoted`levers D; but in this instance we show but one of them so connected.

A strong spiral spring, E, is also attached to each of the levers D', to retract them when released, as hereinafter described. When the apparatus is set ready for operation the levers D' are held in the position shownin full lines, Fig. 3-that is, at nearly right angles to the partition f by the Vertical pivoted levers D, with which the wires B connect. When catches dare released (by reason of the dog e being raised by tension on wire B the levers l) ceasc to hold the levers D' against the tension of springs E, and the al arm is at once sounded.

The operation may be more particularly described as follows: \Vhen a window is raised or door opened, the branch wire a, attached thereto, and the nain wire B', with which it is connected, are subjected to increased tension. The dog c is thereby raised and the catch d released. Wire B then slackens, lever D releases lever D', and its spring E throws the latter into the position shown in dotted lines, Fig. 3, thns overeoming the tension ot' spring m, and. drawing the har T, l v contact with pins e, in the direction ndicated by the arrow, which allows the clain n to slacken, and releases the eseapement, so that the clock-work will operate t'reely and sound the alarm.

The proximate means for indeating the apartment the door or window of which has been opened are vertieal pivoted levers 0, eords P, and small slields or doors lt, hinged to the outer side ot' the box or case, and covering the respective names or nnmhers of the apartments. The pper eds ot' the said levers are connected with the hinged slields R by said cords l and the lower ends of the levers are in such position that they are strek by the horizontal levers 1)' when the latter are retraeted by springs E. llenee, when an apartment is entered, the lever l) to which a eorrespondng wire, l, is attaehed, will he released, also the levers 1)', and the latter will then throw the eorresponding* vertical lever into an inelined position and raise the shield lt, eovering the name of said apartment, so that it may he instantly known where the hnrglar is seeking, or has made, an entranee.

Fig. 5 represents a plan view of the iner side of' a butt-linge having a eord or wire passed through serew-eyes attaehed to its leaves in the nanner we propose. The woodwork where the hing'e is :pplied will le 'ei cessed to receive the cords and screw-eyes. When the door is opened the leaves ol' the eord will be subjeeted to tension.

What we claim is 1. In combination with the doors or windows of a dwelling or other building, the wires B', releasing devices G, wires B, levers I) and 1)', springs E, ehain n, spring m, and eloekwork and gong, substantally as shown and described, to operate as specified.

:3. ln eomhination with the doors or windows of a dwelling or other building, the main wires B' and wires B, the pivoted spring-dog c, and catch d, as shown and described.

3. The eomhination of the levers 1)', the har I, provided with fingers, the spring m, ehain n, and alarm neehanism, all as shown and descrihed.

4. The eomhination ot' the vertical leversO, cords P, hinged name-shields lt, and horizontal levers 1)', snhstantially as shown and deserihed for the purpose specified.

5. The eoinhination of the nane-indieating slields, the alarm neehanisn, the levers 1)', and means t'or eonneeting said parts, and wires for eoneeting with the doors and windows ol' a building', shstantially as shown and deseriled.

HARLES E. IIAltT. TORY JOHNSUN. \\'it nesses:

.Ixo. AnerANnER, li. (M'In. 

